Vermont AZ and AK for 3
Maine almost joined Arizona, Alaska and Vermont.
Earlier this year, the Maine legislature tried to repeal the need to have a permit to conceal/carry.
It failed by one vote; a Republican woman. Her reason; the current law requires a firearm training class to obtain a conceal/carry permit. If there was no need to obtain a permit, the requirement to attend a firearm training class would be eliminated.
The Maine legislature may try again in the next session.